Saw-set.



F. A. DRAGER.

' SAW SET.

APPLICATION FILED JAN. 8, 1912.

1,034,593. PatentedAug. 6,1912.

2 SHEETS-SHEET 2.

COLUMBIA PLANOYOIIAPH CO" WASHINGTON, D- C;

F. A. DRAGER.

SAW SET.

APPLICATION FILED JAN. 8, 1912.

1,034,593. r Patented Aug. 6,1912.

2 BHEETSSHEET 1.

COLUMBIA PLANOGRAPH CO., WASHINFINN, D- C.

FREDERICK A. DRAGER, or FLINT, MICHIGAN.

SAW-SET.

Specification of Letters Patent.

Patented Aug. 6, 1912.

Application filed January 8, 1912. Serial No. 670,011.

To all whom it may concern.-

Be it known that I, FREDERICK A. DRAGER, a citizen of the United States,residing at Flint, in the county of Genesee and State of Michigan, haveinvented certain new and useful Improvements in Saw-Sets; and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to metal tools and implements, and moreespecially to sawsetting tools wherein the set is slidably mounted andspring projected; and the ob ject of the same is to produce a tool ofthis kind in which the force struck by the hammer may be adjusted inseveral different ways.

To this end the invention consists in the specific means for mounting orhousing the spring within the barrel so that its tension may beincreased or decreased, and in the use of a special form of latchadjustably pivoted to the handle so that its action may be varied tocompress said spring to a greater or lesser degree before the hammer orplunger is released.

The following specification describes my invention more in detail, asshown in the accompanying drawings wherein Figure 1 is a side elevationof this improved saw set complete, and Fig. 2 a central verticallongitudinal sectional view thereof. Fig. 3 is a plan view of the same,and Fig 4: a bottom plan. Figs. 5 and 6 are sectional views on the lines55 of Fig. 2 and 6-6 of Fig. 1, respectively.

In the drawings the numeral 1 designatesa barrel made up of upper andlower sections or halves of semi-cylindrical shape, preferably cast withlips 2 along their edges which come together in pairs when the halvesare assembled and may be connected by bolts or rivets 3 as seen in Fig.1, the upper section having a longitudinal slot 4 and the lower sectiona longitudinal slot 5 for purposes to appear hereinafter. Internally therear ends of said sections are threaded to receive a threaded plug 6which closes the rear end of the barrel and is adjustable for a purposeto appear below. The front end of the lower sect-ion carries a dependinginner jaw 7 having through it several threaded holes for a set screw 8which may be adjusted so that the inclination of the saw blade S may bevaried as desired. The upper section is made a little longer than thelower section, and its front end is provided with an outer jaw 9 piercedwith an upright slot 10 through which passes a headed screw 11 whose tipsupports the anvil 12 within this jaw in such manner that it may be sethigher or lower according to the length of the saw tooth to be set. Thehammer or plunger 13 is by preference a solid piece of metal ofcylindrical contour so that it will fit within the tubular barrel, withits front end or nose 14 shaped to do the setting and possibly temperedto with stand the blows that it is to strike, and its rear end 15 cutoif fiat so that it may be borne upon by an expansive spring 16 coiledwithin the rear portion of the barrel forward of the plug 6 as shown inFig. 3. This hammer is mounted slidably within the barrel, and it isprevented from rotating therein by means of a screw 17 passing upwardloosely through the lower slot 5 which of course is made of sufiicientlength to permit the necessary movements of the hammer and is properlydisposed so that its nose 1 1 shall stand upright as well understood. Inthe upper side of the hammer is formed a rather long recess 18 whosefront end 19 may be beveled and whose rear end 20 has an upright wallfor a purpose to appear, and this recess stands below the uppermost slot4 which is made suficient-ly long for the action yet to be described.

The upper barrel section is preferably cast with ears 21 between whichat 22 is pivoted the front end of a handle 23 which overlies the barreland is normally raised by means of an expansive spring 24 between theseelements with its extremities mounted on studs 25 to prevent itsdisplacement. At about its midlength there is formed on the under sideof this handle a web or fin 26 having a plurality of transverse holes 27through it, and'28 designates a latch or push bar whose upper end ispivotally mounted on a pin 29 adapted to pass through any of said holesand whose lower end is rounded on its under side as at 30 so as toproduce a nose which will reliably engage the upright rear end :20 ofthe recess 18 when the handle is raised as seen in Fig. 1 but which willslip off or out of engagement therewith when the handle is depressed toabout the point shown in Fig. 2.

All parts are by preference of metal, of

the desired sizes, shapes, proportions and materials, and the operationof a saw set is too well known to need amplification here, I may say,however, that when the set screws 8 and 11 have been properly adjustedas the character of the saw and the length and thickness of its teethdemand, the plug (3 may be adjusted to increase or diminish the strengthof the spring 16 and therefore vary the force of the blow which will bedelivered by the hammer 13. It will be clear, also, that when the pin 29is adjusted into the rearmost hole 27 of the lever or handle 23, thelatch or push bar 28 will shove the hammer farther back than when theparts stand as seen in Fig. 2, with the result that the spring 16 willbe more forciloly compressed and. the hammer will have a longer strokewithin. the barrel. lVhen the adjustments referred to are in theopposite direction, the force of the blow and the length of the strokewill be correspondingly reduced.

What is claimed as new is:

In a saw set, the combination with a tubir lar barrel having alongitudinal slot along its top, internal threads at its rear end, and

adjustably mounted in the threaded rear end of the barrel, a coiledexpansive spring therein forward of said plug, and a reciprocatinghammer mounted therein forward of the spring and'having in its upperside a recess registering with said slot in the barrel and provided withan abrupt rear end, for the purpose set forth. .v V

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

FREDERICK A. DRAGER. Y

lVitnesses GnAoE L. GLi-irr, ALFRED E. CATTERFELD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G. Y

